Premises and Equipment (Components of Premises and Equipment) (Detail) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Premises and equipment	$ 64,382	$ 62,924
Less accumulated depreciation	(34,301)	(31,465)
Property, Plant and Equipment, Net, Total	30,081	31,459
Land [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	9,155	7,745
Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	1,459	1,384
Premises [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	34,922	34,922
Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	$ 18,846	$ 18,873